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Linux Foundation Certified Kubernetes Application Developer Exam Sample Questions (Q56-Q61):

NEW QUESTION # 56
You are tasked With setting up a Kubernetes cluster With a service that exposes a web application, along with a database running as a stateful set The application needs to access the database through an internal IP address, but the database should not be accessible from outside the cluster. What are the steps involved to configure this, and what components should be used to achieve this setup?

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
I). Create the Database StatefuISet:
- Define a StatefulSet for your database, ensuring it uses a persistent volume to store its data.
- Specify the database image and any necessary configuration.
- Configure a service of type 'ClusterlP' for the database, accessible only within the cluster

2. Create the Application Deployment: - Create a Deployment for your web application, specifying the application image and required ports. - Add an environment variable to the application container to define tne database connection string, using the database service's ClusterlP.

3. Create the Application Service: - Create a service of type 'LoadBalancers (or 'NodePort' if using a cloud provider) for your web application, exposing it to the outside world. - Ensure the service points to the application deployment.

4. Verify the Setup: - Ensure all resources are created successfully by running 'kubectl get all' - Access the web application through the external IP address exposed by the LoadBalancer service. - Verify that tne application can connect to the database. By following these steps, you've created a secure setup where the database is only accessible from within the cluster, while your web application can communicate With the database and expose its services to the outside world. , You have a Kubernetes cluster with multiple namespaces: 'dev', 'staging', and 'production'. You need to implement a network policy that allows pods in the 'dev' namespace to access services running in the 'staging' namespace. POdS in the 'dev' namespace should only be allowed to connect to ports 80 and 443 on the services in the 'staging' namespace. Implement the network policy configuration. A. See the solution below with Step by Step Explanation. Answer: A

NEW QUESTION # 57
Exhibit:

Context
A web application requires a specific version of redis to be used as a cache.
Task
Create a pod with the following characteristics, and leave it running when complete:
* The pod must run in the web namespace.
The namespace has already been created
* The name of the pod should be cache
* Use the Ifccncf/redis image with the 3.2 tag
* Expose port 6379

A. Solution:
B. Solution:

Answer: B

NEW QUESTION # 58
You need to schedule a job to run every day at 10:00 AM to clean up old container images in your Kubernetes cluster These images are tagged with "app=my-app" and have been created in the last 7 days. How would you implement this using a CronJob?

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a CronJob YAML file:

2. Apply the Cronjob: bash kubectl apply -f image-cleanup-cronjob.yaml 3. Verify the CronJob: bash kubectl get cronjobs - Schedule: The 'schedule' field defines the cron expression, which triggers the job every day at 10:00 AM. - Job Template: - The 'j0bTemplate' defines the actual job that Will be executed. - Container: - The 'image' field specifies the container image to use. In this case, it's a container with 'kubectr pre-installed_ - The 'command' and Sargs' fields detine the command to run in the container. The command uses 'kubectr to list images With the specified label and then iterates through them, checking their creation date. If an image is older than 7 days, it's deleted. - RestaftPolicy: The 'restartPolicy' is set to 'OnFailure' to ensure the job restarts if it fails. Important Note: - Make sure the container image you choose has the necessary tools (like 'kubectl') to interact with your Kubernetes cluster. - This solution assumes you have the necessary permissions to delete images. If not, you may need to modify the 'kubectl delete image' command to use appropriate RBAC roles. - This solution doesn't consider images used by running pods. You should adjust the script to exclude images that are currently in use. This Cronjob will automatically run every day, cleaning up old container images and maintaining a clean environment in your cluster.,

NEW QUESTION # 59
You have a Kubernetes deployment tnat uses a ConfigMap to provide configuration settings to your application. You need to update tne ConfigMap with new settings without restarting the deployment.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Update the ConfigMap:
- Create or update your ConfigMap YAML file, for example, Sapp-config.yaml':

- Replace and 'debug' with the desired new values. 2. Apply the Updated ConfigMap: - Apply the updated ConfigMap using: bash kubectl apply -f app-config.yaml 3. Verify the Update: - Check the updated ConfigMap using: bash kubectl get configmap app-config -o yaml - Confirm that the new settings are reflected in the ConfigMap. 4. (Optional) Monitor Application Logs: - If your application is logging configuration values, you can check the logs to ensure it's now using the updated settings.

NEW QUESTION # 60
You have a Deployment that runs a critical service with 5 replicas. You need to update the service with a new image, but you want to ensure that only one replica is unavailable at a time during the update process. You also want to control how long the update process can take. How would you implement this using the 'rollinglJpdate' strategy?

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Update the Deployment YAMLI
- Set 'strategy.type' to 'RollingLJpdate'
- Configure 'strategy.rollingupdate.maxunavailable' to 'I' to limit the number of unavailable replicas during the update.
- Set 'strategy-rollinglJpdate.maxSurge' to to allow for a maximum of six replicas during the update process.

2. Control Update Duration (Optional): - Optionally, you can use 'strategy-rollingUpdate.partition' to control the number of pods updated at a time. This allows you to slow down the update process by updating fewer pods at once- For example, setting 'partition' to ' 2' would update only two pods at a time.

3. Create or IJpdate the Deployment: - Apply the updated YAML file using 'kubectl apply -f my-critical-service-deployment.yaml' 4. Trigger the Update: - Update the image of your application to a newer version. - You can trigger the update by pushing a new image to your container registry. 5. Monitor the Update: - Use 'kubectl get pods -I app=my-critical-service to monitor the pod updates during the rolling update process. - Observe the pods being updated one at a time, ensuring that there's always at least four replicas available. 6. Check for Successful Update: - Once the update is complete, use 'kubectl describe deployment my-critical-service' to verify that the 'updatedReplicaS field matches the 'replicas' field.,

NEW QUESTION # 61
......

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Free PDF 2025 Linux Foundation CKAD: Linux Foundation Certified Kubernetes Application Developer Exam Pass-Sure New Exam Practice

CKAD Latest Exam Pdf & CKAD Exam Success

Linux Foundation Certified Kubernetes Application Developer Exam Sample Questions (Q56-Q61):

Verified Linux Foundation New CKAD Exam Practice With Interarctive Test Engine & Efficient CKAD Latest Exam Pdf

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